Lembeh Strait, the area around Mawali Wreck

Lembeh Strait · Indonesia · Wreck

Mawali Wreck

A 60 m wartime cargo hull on its side under crinoids

Area photo: Bernard DUPONT · CC BY-SA 2.0

One of the few named wreck dives in a strait otherwise given over to sand: a Japanese Second World War steel cargo ship lying completely on its side in 15 to 30 m. The 60 m hull is fully reclaimed, covered in crinoids, black coral trees and soft corals, and it works as much as a structure dive as a wreck.

Where it is and how deep

Depth profile of Mawali Wreck: typical dive 15–30 m (50–100 ft) 18 m · Open Water30 m · Advanced40 m · Recreational limit15 m30 mtypical dive
Depths on a shared scale to 40 m (130 ft); dashed lines mark common certification limits.

No published position for this site — the map shows Lembeh Strait and its other sites; operators know the mooring.

The dive

The wreck lies completely on its side, with the shallow end of the structure at about 15 m and the deepest part at 30 m, so the dive is usually run deep first along the lower flank and shallow at the end. Sixty metres of hull gives plenty to follow in one direction and come back along in the other, and on a strait where most dives are a search across open sand, the fixed line of the ship is unusually easy navigation.

The plating is fully reclaimed rather than bare steel: crinoids, black coral trees and soft corals cover it, which is what makes it worth the depth. Enormous scorpionfish sit still against that growth and take finding, lionfish hold in the lee of the structure, and spotted barramundis use the shadowed sections. The wreck is the subject as much as anything on it, so the growth and the angles of the collapsed side are what most people come back with.

Depth is the limiting factor. At 30 m no-decompression time is short and there is no shallow reef nearby to drift off onto, so the profile is planned around leaving the lower flank early. Come up the structure to its shallow end for the last part of the dive rather than swimming off the wreck into open water.

The wreck

Vessel
Japanese Second World War steel cargo ship
Type
Cargo ship
Length
60 m (197 ft)
Cause
Not recorded in published sources
Lies
Completely on its side, between 15 and 30 m

Marine life and season

  • Macro critters
Month-by-month season rating for Mawali Wreck
JanFebMarAprMayJunJulAugSepOctNovDec
GoodGoodGoodGoodPrimePrimePrimePrimePrimePrimeGoodGood

Season follows Lembeh Strait: Diveable year-round; May–October dry season brings marginally clearer water for photography.

Know before you go

  • The deep flank sits at 30 m, which cuts no-decompression time sharply on air; plan the turn on the lower side early and finish on the shallow end of the hull.

Sources

  1. Lembeh Strait Dive Sites — Dive The World

More dive sites in Lembeh Strait

A swim-through at 22 to 25 m lined with crinoids

to 30 madvanced

Muck & macro

Sand, rubble and algae on a point that pulls in nutrient-rich water

8–18 m · max 28 mbeginner

Muck & macro

Zebra crabs sheltering in the spines of purple heart urchins

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Sea fans on the mini-wall hold pygmy seahorses

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A shallow coral bowl between two soft-coral mini walls

to 28 mintermediate

Muck & macro

The strait's only white-sand muck site, with coral in the shallows

8–18 m · max 28 mbeginner

Muck & macro

Banggai cardinalfish in the hundreds under a night torch

8–15 mintermediate

Muck & macro

Blue-ringed, coconut and mimic octopus on one black sand slope

5–25 mbeginner

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